EXCLUSIVE: Gwen Stefani spotted at Blake Shelton's recording studio -- just cozying up or making Music?

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EXCLUSIVE: Gwen Stefani Visits Blake Shelton at Recording Studio

Are Gwen Stefani and Blake Shelton making sweet music together?

Shelton was spotted on Wednesday morning at the Los Angeles studio where The Voice coach training happens -- and he was joined three hours later by none other than Stefani. The 46-year-old singer arrived in a stylish red leather jacket, jeans, and a black t-shirt that showed off her flat stomach, and an eyewitness tells ET Stefani was in a hurry as she rushed into the studio.

WATCH: Gwen Stefani Bonds With Kourtney Kardashian, as Gavin Rossdale Steps Out Still Wearing His Wedding Ring

Shelton eventually left separately through the back door, but not before displaying his good mood. When asked how he and Stefani's relationship was going, the 39-year-old country star happily responded, "Going good!"

Obviously, the new sighting is giving fuel to their fans' hope that the couple is recording a song together. Earlier this month, a source confirmed to ET that the musicians have penned a song together, though it was unknown if they had recorded it yet.

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Blake Shelton and Gwen Stefani
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EXCLUSIVE: Gwen Stefani spotted at Blake Shelton's recording studio -- just cozying up or making Music?
EAST HAMPTON, NY - AUGUST 20: Blake Shelton and Gwen Stefani attend the Apollo in the Hamptons 2016 party at The Creeks on August 20, 2016 in East Hampton, New York. (Photo by Patrick McMullan/Patrick McMullan via Getty Images)
EAST HAMPTON, NY - AUGUST 20: Blake Shelton and Gwen Stefani perform at Apollo in the Hamptons 2016 at The Creeks on August 20, 2016 in East Hampton, New York. (Photo by Kevin Mazur/Getty Images for The Apollo)
EAST HAMPTON, NY - AUGUST 20: Blake Shelton, Gwen Stefani and Ronald O. Perelman attend Apollo in the Hamptons 2016 at The Creeks on August 20, 2016 in East Hampton, New York. (Photo by Kevin Mazur/Getty Images for The Apollo)
EAST HAMPTON, NY - AUGUST 20: Blake Shelton and Gwen Stefani attend Apollo in the Hamptons 2016 at The Creeks on August 20, 2016 in East Hampton, New York. (Photo by Kevin Mazur/Getty Images for The Apollo)
LAS VEGAS, NEVADA - MAY 22: Blake Shelton and Gwen Stefani are seen on stage during the 2016 Billboard Music Awards held at the T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by JB Lacroix/WireImage)
Blake Shelton and Gwen Stefani embrace after performing "Go Ahead And Break My Heart" at the 2016 Billboard Awards in Las Vegas, Nevada, U.S., May 22, 2016. REUTERS/Mario Anzuoni
LAS VEGAS, NV - MAY 22: Recording artists Gwen Stefani (L) and Blake Shelton perform onstage during the 2016 Billboard Music Awards at T-Mobile Arena on May 22, 2016 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images)
BURBANK, CA - MAY 09: Singers Blake Shelton (L) and Gwen Stefani perform on the Honda Stage at the iHeartRadio Theater on May 9, 2016 in Burbank, California. (Photo by Kevin Winter/Getty Images for iHeartMedia)
BURBANK, CA - MAY 09: Singers Blake Shelton (L) and Gwen Stefani perform on the Honda Stage at the iHeartRadio Theater on May 9, 2016 in Burbank, California. (Photo by Kevin Winter/Getty Images for iHeartMedia)
DISNEY CHANNEL PRESENTS THE RADIO DISNEY MUSIC AWARDS - Entertainment's brightest young stars turned out for the 2016 Radio Disney Music Awards (RDMA), music's biggest event for families, at Microsoft Theater in Los Angeles on Saturday, April 30. 'Disney Channel Presents the 2016 Radio Disney Music Awards' airs Sunday, May 1 (7:00 p.m. EDT). (Image Group LA /Disney Channel) BLAKE SHELTON, GWEN STEFANI
BEVERLY HILLS, CA - FEBRUARY 28: Recording artists Gwen Stefani (L) and Blake Shelton arrive at the 2016 Vanity Fair Oscar Party Hosted By Graydon Carter at Wallis Annenberg Center for the Performing Arts on February 28, 2016 in Beverly Hills, California. (Photo by John Shearer/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 28: Recording artists Gwen Stefani (L) and Blake Shelton arrive at the 2016 Vanity Fair Oscar Party Hosted By Graydon Carter at Wallis Annenberg Center for the Performing Arts on February 28, 2016 in Beverly Hills, California. (Photo by John Shearer/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 14: Blake Shelton and Gwen Stefani attend the 2016 Pre-GRAMMY Gala and Salute to Industry Icons honoring Irving Azoff at The Beverly Hilton Hotel on February 14, 2016 in Beverly Hills, California. (Photo by Kevin Mazur/WireImage)
BEVERLY HILLS, CA - FEBRUARY 14: Recording artists Blake Shelton (L) and Gwen Stefani attend the 2016 Pre-GRAMMY Gala and Salute to Industry Icons honoring Irving Azoff at The Beverly Hilton Hotel on February 14, 2016 in Beverly Hills, California. (Photo by Kevin Mazur/WireImage)
GLENDALE, AZ - DECEMBER 27: Gwen Stefani and Blake Shelton wave to fans prior to the NFL game between the Green Bay Packers and Arizona Cardinals at University of Phoenix Stadium on December 27, 2015 in Glendale, Arizona. (Photo by Norm Hall/Getty Images)
GLENDALE, AZ - DECEMBER 27: Musicians Gwen Stefani and Blake Shelton attend the NFL game between the Green Bay Packers and Arizona Cardinals at the University of Phoenix Stadium on December 27, 2015 in Glendale, Arizona. (Photo by Christian Petersen/Getty Images)
Dec 27, 2015; Glendale, AZ, USA; Recording artist Gwen Stefani (left) and country singer boyfriend Blake Shelton on the Arizona Cardinals sideline prior to the game against the Green Bay Packers at University of Phoenix Stadium. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports
GLENDALE, AZ - DECEMBER 27: Musicians Gwen Stefani and Blake Shelton attend the NFL game between the Green Bay Packers and Arizona Cardinals at the University of Phoenix Stadium on December 27, 2015 in Glendale, Arizona. (Photo by Christian Petersen/Getty Images)
Cast member Blake Shelton and singer Gwen Stefani laugh at the party following the premiere for "The Angry Birds Movie" in Los Angeles, U.S., May 7, 2016. REUTERS/Mario Anzuoni
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0126 -- Pictured: (l-r) Singer Gwen Stefani and singer Blake Shelton during a lip synch battle on September 17, 2014 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- Season: 7 -- Pictured: (l-r) Adam Levine, Carson Daly, Gwen Stefani, Blake Shelton, Pharrell Williams -- (Photo by: Art Streiber/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Blind Auditions' Episode 701 -- Pictured: (l-r) Adam Levine, Gwen Stefani, Pharrell Williams, Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Blind Auditions' Episode 701 -- Pictured: (l-r) Adam Levine, Pharrell Williams, Blake Shelton, Gwen Stefani, Carson Daly -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Blind Auditions' Episode 701 -- Pictured: (l-r) Adam Levine, Gwen Stefani, Blake Shelton, Pharrell Williams -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Live Show' Episode 718B -- Pictured: (l-r) Gwen Stefani, Craig Wayne Boyd, Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Season 9 Press Junket' -- Pictured: (l-r) Pharrell Williams, Adam Levine, Carson Daly, Gwen Stefani, Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0353 -- Pictured: (l-r) Singer Adam Levine, singer Gwen Stefani, host Jimmy Fallon, singer Blake Shelton, and singer Pharrell Williams play Spin the Microphone with The Voice Coaches on October 26, 2015 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Battle Rounds' -- Pictured: (l-r) Adam Levine, Pharrell Williams, Blake Shelton, Gwen Stefani -- (Photo by: Trae Patton/NBC)
THE VOICE -- 'Live Show' Episode 718B -- Pictured: (l-r) Gwen Stefani, Adam Levine, Pharrell Williams, Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Blind Auditions' -- Pictured: (l-r) Pharrell Williams, Gwen Stefani, Blake Shelton -- (Photo by: Trae Patton/NBC)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0353 -- Pictured: (l-r) Singer Adam Levine, singer Gwen Stefani, host Jimmy Fallon, singer Blake Shelton, and singer Pharrell Williams play Spin the Microphone with The Voice Coaches on October 26, 2015 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - OCTOBER 27: Singers Adam Levine,Blake Shelton, Gwen Stefani, Pharell Williams are seen on the 'Today Show'on October 27, 2015 in New York City. (Photo by Raymond Hall/GC Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0353 -- Pictured: (l-r) Singer Adam Levine, singer Gwen Stefani, host Jimmy Fallon, singer Blake Shelton, and singer Pharrell Williams play Spin the Microphone with The Voice Coaches on October 26, 2015 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Live Top 11' Episode 915B -- Pictured: (l-r) Adam Levine, Gwen Stefani, Pharrell Williams, Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Live Semis' Episode 917B -- Pictured: (l-r) Adam Levine, Gwen Stefani, Pharrell Williams, Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
THE VOICE -- 'Live Show' Episode 718B -- Pictured: (l-r) Gwen Stefani, Craig Wayne Boyd, Blake Shelton -- (Photo by: Trae Patton/NBC/NBCU Photo Bank via Getty Images)
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Or perhaps the studio interlude was because the two were just looking to spend more private time together? Later that night, Stefani and Shelton met up once again to attend Barneys New York's private dinner celebrating jewelry designer Jennifer Meyer's exclusive ready-to-wear collection. The two mingled with their fellow A-listers at the event, which was also attended by Jennifer Aniston, Kris Jenner, Courteney Cox, Katy Perry, Nicole Richie and Chelsea Handler.

"Gwen and Blake seemed really happy," a source inside the party tells ET. "They were hanging together inside the party and near each other the whole time."

Stefani was snapped sporting the same white belt and jeans she was wearing earlier at the studio with Shelton, but changed into a white blouse and an eye-catching black jacket.

Though the two weren't photographed together at the event, Shelton happily posed with actor Tobey Maguire, who's married to Meyer.

WATCH: Gwen Stefani and Blake Shelton Serve Up Some Sweet PDA on 'The Voice'

The Voice coaches' relationships only appears to be getting more serious. ET recently learned that Shelton is close to completing his new home -- only an hour away from his hometown of Ada, Oklahoma -- and, in late October, he gave his girlfriend the grand tour.

"Blake gave Gwen her biggest taste of country life," a local resident and friend of Shelton's told ET. "They ate home cooking at his favorite diners and Blake took her to his new lake house. There's no Starbucks around here. If she's still around after that then it must be serious!"

For a look at the incredible home, watch below:

See Blake Shelton's New Oklahoma Home - Gwen's Already Been There!
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